The be quiet! Pure Power 12 M is a quiet PSU, honoring the brand’s name, with ATX v3.0 and PCIe 5.0 compatibility. It comes with a 600W 12VHPWR connector, although ATX spec recommends a 300W for this capacity, and it is supported by a ten-year warranty.
The be quiet! Pure Power 12 M 850W is included in my best ATX v3.0 & PCIe 5.0 PSU picks article.
be quiet! is known for its silent products, and the Pure Power 12 M is no exception, although it is not the quietest unit in the 850W category. It is equipped with a 600W 12VHPWR connector, although this is overkill for an 850W unit, and has a pair of 12V rails. The fully modular cable design is a must in this price category. Efficient-wise, this unit gets a Cybenetics Platinum rating, meaning that its platform is efficient and more efficient than the 80 PLUS Gold badge depicts. I should note that 80 PLUS checks efficiency at only 3-4 different load levels. At the same time, Cybenetics does that from the results of more than 1450 different load combinations, so you can easily figure out which standard provides higher accuracy.
The PSU is compact enough, with 160mm depth. It has normal dimensions for today’s standards. The cooling fan measures 120mm in diameter and has no semi-passive operation, which is not a big deal when the fan spins at low speeds under light loads. It is preferable to have the fan spinning constantly, not allowing heat build up at the PSU’s internals.
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